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ffmpeg / libswscale / swscale-example.c @ 591e465a

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1 c9b99ea6 Michael Niedermayer
/*
2 d026b45e Diego Biurrun
 * Copyright (C) 2003 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * This file is part of FFmpeg.
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 *
6 54e3ae2e Diego Biurrun
 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
10 d026b45e Diego Biurrun
 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 54e3ae2e Diego Biurrun
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
15 d026b45e Diego Biurrun
 *
16 54e3ae2e Diego Biurrun
 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
18 b19bcbaa Diego Biurrun
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 d026b45e Diego Biurrun
 */
20 c9b99ea6 Michael Niedermayer
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <inttypes.h>
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#include <stdarg.h>
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27 e9e12f0e Luca Abeni
#undef HAVE_AV_CONFIG_H
28 83da2c6f Diego Biurrun
#include "libavutil/avutil.h"
29 9a034dde Ramiro Polla
#include "libavutil/lfg.h"
30 c9b99ea6 Michael Niedermayer
#include "swscale.h"
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32 71ed6c8f Ramiro Polla
/* HACK Duplicated from swscale_internal.h.
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 * Should be removed when a cleaner pixel format system exists. */
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const char *sws_format_name(enum PixelFormat format);
35 f5a9c4ee Ramiro Polla
#define isGray(x)       (           \
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           (x)==PIX_FMT_GRAY8       \
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        || (x)==PIX_FMT_GRAY16BE    \
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        || (x)==PIX_FMT_GRAY16LE    \
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    )
40 a48ce2c3 Ramiro Polla
#define hasChroma(x)   (!(          \
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            isGray(x)               \
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        || (x)==PIX_FMT_MONOBLACK   \
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        || (x)==PIX_FMT_MONOWHITE   \
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    ))
45 71ed6c8f Ramiro Polla
#define isALPHA(x)      (           \
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           (x)==PIX_FMT_BGR32       \
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        || (x)==PIX_FMT_BGR32_1     \
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        || (x)==PIX_FMT_RGB32       \
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        || (x)==PIX_FMT_RGB32_1     \
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        || (x)==PIX_FMT_YUVA420P    \
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    )
52 dc822901 Diego Biurrun
53 dd68318c Ramiro Polla
static uint64_t getSSD(uint8_t *src1, uint8_t *src2, int stride1, int stride2, int w, int h)
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{
55 221b804f Diego Biurrun
    int x,y;
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    uint64_t ssd=0;
57 c9b99ea6 Michael Niedermayer
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//printf("%d %d\n", w, h);
59 6a4970ab Diego Biurrun
60 dd68318c Ramiro Polla
    for (y=0; y<h; y++) {
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        for (x=0; x<w; x++) {
62 221b804f Diego Biurrun
            int d= src1[x + y*stride1] - src2[x + y*stride2];
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            ssd+= d*d;
64 c9b99ea6 Michael Niedermayer
//printf("%d", abs(src1[x + y*stride1] - src2[x + y*stride2])/26 );
65 221b804f Diego Biurrun
        }
66 c9b99ea6 Michael Niedermayer
//printf("\n");
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    }
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    return ssd;
69 c9b99ea6 Michael Niedermayer
}
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// test by ref -> src -> dst -> out & compare out against ref
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// ref & out are YV12
73 591e465a Stefano Sabatini
static int doTest(uint8_t *ref[4], int refStride[4], int w, int h, enum PixelFormat srcFormat, enum PixelFormat dstFormat,
74 dd68318c Ramiro Polla
                  int srcW, int srcH, int dstW, int dstH, int flags)
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{
76 1cd98da8 Benoit Fouet
    uint8_t *src[4] = {0};
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    uint8_t *dst[4] = {0};
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    uint8_t *out[4] = {0};
79 110f147a Cédric Schieli
    int srcStride[4], dstStride[4];
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    int i;
81 f5a9c4ee Ramiro Polla
    uint64_t ssdY, ssdU=0, ssdV=0, ssdA=0;
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    struct SwsContext *srcContext = NULL, *dstContext = NULL,
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                      *outContext = NULL;
84 221b804f Diego Biurrun
    int res;
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    res = 0;
87 dd68318c Ramiro Polla
    for (i=0; i<4; i++) {
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        // avoid stride % bpp != 0
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        if (srcFormat==PIX_FMT_RGB24 || srcFormat==PIX_FMT_BGR24)
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            srcStride[i]= srcW*3;
91 5d5a8813 Kostya Shishkov
        else if (srcFormat==PIX_FMT_RGB48BE || srcFormat==PIX_FMT_RGB48LE)
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            srcStride[i]= srcW*6;
93 221b804f Diego Biurrun
        else
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            srcStride[i]= srcW*4;
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        if (dstFormat==PIX_FMT_RGB24 || dstFormat==PIX_FMT_BGR24)
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            dstStride[i]= dstW*3;
98 5d5a8813 Kostya Shishkov
        else if (dstFormat==PIX_FMT_RGB48BE || dstFormat==PIX_FMT_RGB48LE)
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            dstStride[i]= dstW*6;
100 221b804f Diego Biurrun
        else
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            dstStride[i]= dstW*4;
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103 7b67bd92 Reimar Döffinger
        src[i]= malloc(srcStride[i]*srcH);
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        dst[i]= malloc(dstStride[i]*dstH);
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        out[i]= malloc(refStride[i]*h);
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        if (!src[i] || !dst[i] || !out[i]) {
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            perror("Malloc");
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            res = -1;
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            goto end;
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        }
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    }
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    srcContext= sws_getContext(w, h, PIX_FMT_YUVA420P, srcW, srcH, srcFormat, flags, NULL, NULL, NULL);
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    if (!srcContext) {
116 221b804f Diego Biurrun
        fprintf(stderr, "Failed to get %s ---> %s\n",
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                sws_format_name(PIX_FMT_YUVA420P),
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                sws_format_name(srcFormat));
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        res = -1;
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        goto end;
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    }
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    dstContext= sws_getContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat, flags, NULL, NULL, NULL);
124 1b0a4572 Benoit Fouet
    if (!dstContext) {
125 221b804f Diego Biurrun
        fprintf(stderr, "Failed to get %s ---> %s\n",
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                sws_format_name(srcFormat),
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                sws_format_name(dstFormat));
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        res = -1;
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        goto end;
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    }
132 110f147a Cédric Schieli
    outContext= sws_getContext(dstW, dstH, dstFormat, w, h, PIX_FMT_YUVA420P, flags, NULL, NULL, NULL);
133 1b0a4572 Benoit Fouet
    if (!outContext) {
134 221b804f Diego Biurrun
        fprintf(stderr, "Failed to get %s ---> %s\n",
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                sws_format_name(dstFormat),
136 110f147a Cédric Schieli
                sws_format_name(PIX_FMT_YUVA420P));
137 221b804f Diego Biurrun
        res = -1;
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        goto end;
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    }
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//    printf("test %X %X %X -> %X %X %X\n", (int)ref[0], (int)ref[1], (int)ref[2],
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//        (int)src[0], (int)src[1], (int)src[2]);
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    sws_scale(srcContext, ref, refStride, 0, h   , src, srcStride);
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    sws_scale(dstContext, src, srcStride, 0, srcH, dst, dstStride);
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    sws_scale(outContext, dst, dstStride, 0, dstH, out, refStride);
147 27161c06 Alex Beregszaszi
148 221b804f Diego Biurrun
    ssdY= getSSD(ref[0], out[0], refStride[0], refStride[0], w, h);
149 d426ea20 Ramiro Polla
    if (hasChroma(srcFormat) && hasChroma(dstFormat)) {
150 f5a9c4ee Ramiro Polla
        //FIXME check that output is really gray
151 475f3613 Ramiro Polla
        ssdU= getSSD(ref[1], out[1], refStride[1], refStride[1], (w+1)>>1, (h+1)>>1);
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        ssdV= getSSD(ref[2], out[2], refStride[2], refStride[2], (w+1)>>1, (h+1)>>1);
153 f5a9c4ee Ramiro Polla
    }
154 110f147a Cédric Schieli
    if (isALPHA(srcFormat) && isALPHA(dstFormat))
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        ssdA= getSSD(ref[3], out[3], refStride[3], refStride[3], w, h);
156 6a4970ab Diego Biurrun
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    ssdY/= w*h;
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    ssdU/= w*h/4;
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    ssdV/= w*h/4;
160 110f147a Cédric Schieli
    ssdA/= w*h;
161 6a4970ab Diego Biurrun
162 4ed88643 Reimar Döffinger
    printf(" %s %dx%d -> %s %4dx%4d flags=%2d SSD=%5"PRId64",%5"PRId64",%5"PRId64",%5"PRId64"\n",
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           sws_format_name(srcFormat), srcW, srcH,
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           sws_format_name(dstFormat), dstW, dstH,
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           flags, ssdY, ssdU, ssdV, ssdA);
166 ed2164f3 Diego Biurrun
    fflush(stdout);
167 c9b99ea6 Michael Niedermayer
168 a48ce2c3 Ramiro Polla
end:
169 6a4970ab Diego Biurrun
170 221b804f Diego Biurrun
    sws_freeContext(srcContext);
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    sws_freeContext(dstContext);
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    sws_freeContext(outContext);
173 c9b99ea6 Michael Niedermayer
174 dd68318c Ramiro Polla
    for (i=0; i<4; i++) {
175 221b804f Diego Biurrun
        free(src[i]);
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        free(dst[i]);
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        free(out[i]);
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    }
179 c9b99ea6 Michael Niedermayer
180 221b804f Diego Biurrun
    return res;
181 c9b99ea6 Michael Niedermayer
}
182
183 89fb9516 Ramiro Polla
static void selfTest(uint8_t *ref[4], int refStride[4], int w, int h)
184 dd68318c Ramiro Polla
{
185 6b052ba8 Ramiro Polla
    const int flags[] = { SWS_FAST_BILINEAR,
186 dd653355 Ramiro Polla
                          SWS_BILINEAR, SWS_BICUBIC,
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                          SWS_X       , SWS_POINT  , SWS_AREA, 0 };
188 6b052ba8 Ramiro Polla
    const int srcW = w;
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    const int srcH = h;
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    const int dstW[] = { srcW - srcW/3, srcW, srcW + srcW/3, 0 };
191
    const int dstH[] = { srcH - srcH/3, srcH, srcH + srcH/3, 0 };
192 221b804f Diego Biurrun
    enum PixelFormat srcFormat, dstFormat;
193
194
    for (srcFormat = 0; srcFormat < PIX_FMT_NB; srcFormat++) {
195
        for (dstFormat = 0; dstFormat < PIX_FMT_NB; dstFormat++) {
196 6b052ba8 Ramiro Polla
            int i, j, k;
197 e55ed689 Ramiro Polla
            int res = 0;
198
199 221b804f Diego Biurrun
            printf("%s -> %s\n",
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                   sws_format_name(srcFormat),
201
                   sws_format_name(dstFormat));
202 ae9e0e83 Michael Niedermayer
            fflush(stdout);
203 221b804f Diego Biurrun
204 6b052ba8 Ramiro Polla
            for (i = 0; dstW[i] && !res; i++)
205
                for (j = 0; dstH[j] && !res; j++)
206
                    for (k = 0; flags[k] && !res; k++)
207 89fb9516 Ramiro Polla
                        res = doTest(ref, refStride, w, h, srcFormat, dstFormat,
208 6b052ba8 Ramiro Polla
                                     srcW, srcH, dstW[i], dstH[j], flags[k]);
209 221b804f Diego Biurrun
        }
210
    }
211 c9b99ea6 Michael Niedermayer
}
212
213
#define W 96
214
#define H 96
215
216 dd68318c Ramiro Polla
int main(int argc, char **argv)
217
{
218 221b804f Diego Biurrun
    uint8_t *rgb_data = malloc (W*H*4);
219
    uint8_t *rgb_src[3]= {rgb_data, NULL, NULL};
220
    int rgb_stride[3]={4*W, 0, 0};
221 110f147a Cédric Schieli
    uint8_t *data = malloc (4*W*H);
222
    uint8_t *src[4]= {data, data+W*H, data+W*H*2, data+W*H*3};
223
    int stride[4]={W, W, W, W};
224 221b804f Diego Biurrun
    int x, y;
225
    struct SwsContext *sws;
226 9a034dde Ramiro Polla
    AVLFG rand;
227 221b804f Diego Biurrun
228 7248797c Ramiro Polla
    if (!rgb_data || !data)
229
        return -1;
230
231 7da35acd Ramiro Polla
    sws= sws_getContext(W/12, H/12, PIX_FMT_RGB32, W, H, PIX_FMT_YUVA420P, SWS_BILINEAR, NULL, NULL, NULL);
232 221b804f Diego Biurrun
233 9a034dde Ramiro Polla
    av_lfg_init(&rand, 1);
234
235 dd68318c Ramiro Polla
    for (y=0; y<H; y++) {
236
        for (x=0; x<W*4; x++) {
237 9a034dde Ramiro Polla
            rgb_data[ x + y*4*W]= av_lfg_get(&rand);
238 221b804f Diego Biurrun
        }
239
    }
240 e5091488 Benoit Fouet
    sws_scale(sws, rgb_src, rgb_stride, 0, H, src, stride);
241 64d39b7c Reimar Döffinger
    sws_freeContext(sws);
242 111641a9 Ramiro Polla
    free(rgb_data);
243 27161c06 Alex Beregszaszi
244 e5091488 Benoit Fouet
    selfTest(src, stride, W, H);
245 111641a9 Ramiro Polla
    free(data);
246 516b1f82 Michael Niedermayer
247 d7cf0a6f Ramiro Polla
    return 0;
248 c9b99ea6 Michael Niedermayer
}